CN102717408B - Bamboo and wood composite container bottom plate manufactured by one-step hot pressing and having high elastic modulus and manufacture method thereof - Google Patents

Bamboo and wood composite container bottom plate manufactured by one-step hot pressing and having high elastic modulus and manufacture method thereof Download PDF

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Publication number
CN102717408B
CN102717408B CN201010231754.XA CN201010231754A CN102717408B CN 102717408 B CN102717408 B CN 102717408B CN 201010231754 A CN201010231754 A CN 201010231754A CN 102717408 B CN102717408 B CN 102717408B
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bamboo
veneer
curtain splint
bamboo curtain
layers
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CN102717408A (en
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许斌
罗伯特·威尔伍德
张齐生
陈立衡
蒋身学
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Nanjing Forestry University
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Nanjing Forestry University
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Abstract

The invention is a bamboo and wood composite container bottom plate manufactured by one-step hot pressing and having high elastic modulus and a manufacture method thereof. The structure of the plate is that materials for an upper surface and a lower surface are respectively 3-5 layers of thin bamboo curtains dipped with phenolic glue or melamine glue; an inner layer is a layer of transverse veneer and still inner layers are structural particleboards; or inner layers are all wood veneers; or the longitudinal and transverse wood veneers are replaced by a partial of bamboo curtains; and the number of layers and the fiber direction of the wood veneers or the bamboo curtains are determined by structural principles of wood container bottom plates. The plate has advantages in that by utilizing the outermost layers of bamboo curtain surfaces which are pressed densely and have a high elastic modulus, the elastic modulus of the bottom plate is increased greatly and the energy consumption is small. In addition, the surface bamboo curtains are characterized by low absorbent expansion rate, high hardness and good wear-resistance. Raw material sources of the bottom plate are widened. The finished composite container bottom plate has stable quality, and the performance indexes of the bottom plate, such as strength, elasticity modulus, etc., measure up to the technical requirements of the international container industry.

Description

Once hot-forming high elastic modulus bamboo wood composite container baseboard and autofrettage thereof
Technical field
What the present invention relates to is take multilayer bamboo curtain splint as top layer, and the once bamboo wood composite container baseboard of hot-forming high elastic modulus and manufacture method thereof belongs to the wood-based plate manufacturing technology field in timber industry.
Background technology
The main loaded area of container is base plate, and container manufacture requires base plate to have very high mechanical property, presentation quality, impact resistance and ageing-resistant performance.Existing bamboo wood composite container baseboard has two kinds of forms: patent ZL 98111153.x mesexine is a kind of bamboo wood composite container baseboard that impregnated paper adds bamboo mat, another patent ZL 03152841.4 mesexine is the high-density bamboo material thin layer that hot pressing forms through high pressure, is then composited for core secondary hot pressing with structural particleboard or board using poplar board etc. as table backing layer with it again.The first, in order to obtain beautiful outward appearance, needs impregnated paper and bamboo mat, and bamboo mat needs more cost of labor, and the elastic modelling quantity of base plate is not high; Though rear one also can meet the requirements of mechanical property and acceptable outward appearance, owing to being post forming, also needed cemented surface sanding gluing, then it is compound to pass through secondary hot pressing, consume the more energy, material and labour.These two kinds of bamboo wood composite container baseboards all exist cost high, and case east is difficult to accept, therefore the present invention utilizes special bamboo curtain splint, one-shot forming can obtain the surface quality needing, and the unapproachable high elastic modulus of conventional bamboo wood composite container baseboard.There is material saving, less energy consumption, the feature such as wear-resisting, and the abundant sustainable domestic bamboo timber of available resources produces container bottom board, widened the source of base plate material, there is far-reaching realistic meaning.
Summary of the invention
The object of this invention is to provide a kind of bamboo wood composite container baseboard and manufacture method take multilayer high elastic modulus bamboo curtain splint as top layer.The present invention is the bamboo curtain splint top layer that utilizes the high elastic modulus of the densification reality on top layer, the contribution maximum of the elastic modelling quantity of the high elastic modulus of this layer to base plate, thereby the elastic modelling quantity of base plate can be increased substantially, and top layer bamboo curtain splint has the advantages that expansion rate of water absorption is low, hardness is high and wearability is good, sandwich layer can utilize the materials such as particieboard, Wooden veneer, the bamboo curtain splint for structure of higher anti-shear performance, can be used alone or compound use.Attractive in appearance for top layer, can post one deck thin veneer at the skin of top layer bamboo curtain splint, or hard paper, or phenolic impregnated glass fabric.
Technical solution of the present invention: once hot-forming high elastic modulus bamboo wood composite container baseboard, is characterized in that adopting the thin bamboo curtain splint of the longitudinal texture of one deck, 2～4 layers of longitudinal texture bamboo curtain splint of A one deck cross grain Wooden veneer with top and bottom layer material; Top and bottom layer material A is inwardly structure wood shavings central layer; Or top and bottom layer material A is inside with longitudinal texture Wooden veneer and multilayered wood veneer, totally 11 layers of Wooden veneer, middle three layers are longitudinal texture veneer, and remaining veneer is laid by a longitudinal texture veneer and a cross grain veneer.
The once manufacture method of hot-forming high elastic modulus bamboo wood composite container baseboard, its processing step divides:
A, Wooden veneer, bamboo curtain splint sorting and arrangement, Wooden veneer moisture content≤10%, according to required double spread, glue-spread 250～350g/m 2, ageing or low temperature drying; And the bamboo curtain splint of different-thickness and kind is done to moisture content below 12%, below 20%, in glue, add pesticide to moisture content through the low temperature drying of dipping phenol glue (or melamine glue);
B, structure partice board core stock, using structure with after fixed thick sanding to the 20～22mm of particieboard substrate as central layer;
C, assembly, the material such as Wooden veneer, bamboo curtain splint is used separately or compound use, or by bamboo curtain splint, veneer and structure partice board core stock assembly, it is 125～150 ℃ in temperature, maximum pressure is to carry out hot pressing under the condition of 2.0～4.0MPa, keep 8～35 minutes, then in heating platen, lead to cold water, release after heating platen is cooled to uniform temperature.
Advantage of the present invention: can effectively utilize China and the timber of different tree species, Different Diameter level all over the world, as the various softwoods of wildwood and artificial forest, broadleaf timber, and have that growth is fast, the cycle is short, can cut selectively every year, bamboo timber resource that the sustainable utilization time is long.By independent these materials or compound use, through the design of science and reasonably combination, both can solve hardwood difficulty in short supply in world wide, can solve again the technical barrier of the Novel bottom plate of producing to meet the requirement of trans-container industrial technology in enormous quantities.Using 6～12 layers of thin bamboo curtain splint of high elastic modulus that floods phenol glues as table backsheet, be horizontal one deck veneer inwards, then be inwardly special structure particieboard; Or all use inwards Wooden veneer; Or with part bamboo curtain splint replace in length and breadth two to Wooden veneer, in glue used, all should add pesticide, uniformly penetrating is in the surface material of container bottom board in the time of hot pressing to make it, base plate has long-acting insect protected performance like this; Core material and surface material are combined into slab, then make container bottom board through hot-press gluing, the property indices such as its intensity, elastic modelling quantity, can meet the technical requirement of trans-container industry completely.
Accompanying drawing explanation
Accompanying drawing 1 is once hot-forming high elastic modulus bamboo wood composite container baseboard structural representation of the first.
Accompanying drawing 2 is once hot-forming high elastic modulus bamboo wood composite container baseboard structural representations of the second.
Accompanying drawing 3 is the third once hot-forming high elastic modulus bamboo wood composite container baseboard structural representations.
In figure: the 1st, the thin bamboo curtain splint of longitudinal texture, the dipping phenol glue of each one deck up and down (or melamine glue) of the thin bamboo curtain splint of this longitudinal texture through low temperature drying; The longitudinal texture bamboo curtain splint of the 2nd, A, this longitudinal texture bamboo curtain warp element floods phenol glue (or melamine glue) and through low temperature drying, its thickness is 1.0～1.8mm; The 3rd, cross grain Wooden veneer, this cross grain Wooden veneer double spread or dipping phenol glue through low temperature drying; The 4th, structure partice board core stock; The 5th, longitudinal texture Wooden veneer; The 6th, cross grain bamboo curtain splint, its one deck dipping phenol glue through low temperature drying; The longitudinal texture bamboo curtain splint of the 7th, B, its one deck dipping phenol glue through low temperature drying; The 8th, multilayered wood veneer; The 9th, multilayered wood veneer and bamboo curtain splint.
The specific embodiment
Contrast accompanying drawing 1, its structure is that top layer and the bottom of structure partice board core stock 4 is cross grain Wooden veneers 3, on the top layer, the end of the top layer of cross grain Wooden veneer 3 and the cross grain Wooden veneer 3 that is symmetrical set with it, being three layers of longitudinal texture bamboo curtain splint 2 of A, is the thin bamboo curtain splint 1 of longitudinal texture on the top layer, the end of the top layer of the longitudinal texture bamboo curtain splint 2 of A and the bamboo curtain splint 2 being symmetrical set with it.
Contrast accompanying drawing 2, its structure is that top layer and the bottom of multilayer single plate 8 is longitudinal texture Wooden veneers 5, the longitudinally top layer of texture the Wooden veneer 5 and bottom of symmetrically arranged longitudinal texture Wooden veneer 5 is cross grain Wooden veneers 3 with it, the bottom of the top layer of cross grain Wooden veneer 3 and cross grain Wooden veneer 3 symmetrically arranged with it is three layers of longitudinal texture bamboo curtain splint 2 and the longitudinal thin bamboo curtain splint 1 of texture successively.
Contrast accompanying drawing 3, its structure is that top layer and the bottom of multilayered wood veneer and bamboo curtain splint 9 is the longitudinal texture bamboo curtain splints 7 of B, the bottom of the top layer of the longitudinal texture bamboo curtain splint 7 of B and the longitudinal texture bamboo curtain splint 7 of B symmetrically arranged with it is cross grain bamboo curtain splints 6, the bottom of the top layer of cross grain bamboo curtain splint 6 and cross grain bamboo curtain splint 6 symmetrically arranged with it is longitudinal texture Wooden veneers 5, the longitudinally top layer of texture the Wooden veneer 5 and bottom of symmetrically arranged longitudinal texture Wooden veneer 5 is cross grain Wooden veneers 3 with it, the bottom of the top layer of cross grain Wooden veneer 3 and cross grain Wooden veneer 3 symmetrically arranged with it is four layers of longitudinal texture bamboo curtain splint 2 of A.
Each 1 layer of dipping phenol glue through low temperature drying up and down of the described thin bamboo curtain splint 1 of longitudinal texture; The longitudinal texture bamboo curtain splint 2 of A is through dipping phenol glue and through low temperature drying, and its thickness is 1.0～1.8mm; Cross grain Wooden veneer 3 double spreads or dipping phenol glue through low temperature drying; Longitudinally texture Wooden veneer 5 is veneers that one deck was dried; Its one decks dipping phenol glues of cross grain bamboo curtain splint 6 through low temperature drying; The longitudinal texture bamboo curtain splint 7 of B is one deck dipping phenol glues through low temperature drying; Veneer in multilayered wood veneer 8 is that gluing is not alternate for one deck coating phenol glue and one deck; Bamboo curtain splint in multilayered wood veneer and bamboo curtain splint 9 is dipping phenol glue through low temperature drying, when veneer in multilayered wood veneer and bamboo curtain splint 9 and veneer join, can only on the contact-making surface of, be coated with phenol glue therein, contact with bamboo curtain splint and need on veneer, be coated with phenol glue.
Embodiment 1:
The structure of bamboo wood composite container baseboard is as Fig. 1,
The manufacture method of bamboo wood composite container baseboard is as follows:
A, Wooden veneer, bamboo curtain splint sorting and arrangement, Wooden veneer moisture content≤10%, according to required double spread, glue-spread 250～350g/m 2, ageing or low temperature drying; And thin longitudinal texture bamboo curtain splint 1 and longitudinal texture bamboo curtain splint 2 are dried to moisture content below 12%, below 18%, in glue, add the pesticide of 2.4 grams to moisture content by 1 kilogram of glue (solid content 45%) through the low temperature drying of dipping phenol glue (or melamine glue);
B, structure partice board core stock, using structure with after fixed thick sanding to the 20～22mm of particieboard substrate as central layer;
C, assembly, from outside to inside with each up and down: 1 layer floods phenol glue the thin bamboo curtain splint 1 of longitudinal texture through low temperature drying, three layers of dipping phenol glue be the longitudinal texture bamboo curtain splint 2 of 1.0～1.8mm through the thickness of low temperature drying, then be one deck double spread (or dipping) phenol glue the cross grain Wooden veneer 3 through low temperature drying, middle is structure partice board core stock 4 assemblies.Be 125～150 ℃ in temperature, under the condition that maximum pressure is 2.5～4.0MPa, carry out hot pressing, keep 10～15 minutes, then in heating platen, lead to cold water, release after heating platen is cooled to uniform temperature.After conventional post-production, can obtain finished product composite container baseboard, its physical and mechanical property is as follows:
MOR//：≥95MPa
MOR⊥：≥35MPa
MOE//：≥12000MPa
MOE⊥：≥3500MPa
Density: 0.75～0.90g/cm 3.
Embodiment 2:
The structure of bamboo wood composite container baseboard is as Fig. 2,
The manufacture method of bamboo wood composite container baseboard is as follows:
A, Wooden veneer, bamboo curtain splint sorting and arrangement, Wooden veneer moisture content≤8%, according to required double spread, glue-spread 250～350g/m 2, ageing or low temperature drying; And thin longitudinal texture bamboo curtain splint 1 and longitudinal texture bamboo curtain splint 2 are dried to moisture content below 15%, below 20%, in glue, add the pesticide of 2.4 grams by 1 kilogram of glue (solid content 45%) to moisture content through the low temperature drying of dipping phenol glue (or other weatherability glue);
B, assembly, each from outside to inside: 1 layer floods phenol glue the thin bamboo curtain splint 1 of special longitudinal texture through low temperature drying, 3～4 layers of dipping phenol glue be the longitudinal texture bamboo curtain splint 2 of 1.0～1.5mm through the thickness of low temperature drying, be 11 layers of Wooden veneer inwards, middle three layers are longitudinal texture veneer, and remaining veneer is laid by a longitudinal texture veneer and a cross grain veneer.Then be 125～150 ℃ in temperature, under the condition that maximum pressure is 2.0～3.5MPa, carry out hot pressing, keep 30～35 minutes, then in heating platen, lead to cold water, release after heating platen is cooled to 70 ℃.
After conventional post-production, can obtain finished product composite container baseboard, its physical and mechanical property is as follows: MOR//: >=100MPa
MOR⊥：≥35MPa
MOE//：≥12000MPa
MOE⊥：≥3500MPa
Density: 0.70～0.90g/cm 3.
Embodiment 3,
The structure of bamboo wood composite container baseboard is as Fig. 3,
The manufacture method of bamboo wood composite container baseboard is as follows:
A, Wooden veneer, bamboo curtain splint sorting and arrangement, Wooden veneer moisture content≤8%, according to required double spread, glue-spread 250～350g/m 2, ageing or low temperature drying; And longitudinal texture bamboo curtain splint 2, cross grain bamboo curtain splint 6 and longitudinal texture bamboo curtain splint 7 are dried to moisture content below 12%, below 20%, in glue, add the pesticide of 2.4 grams to moisture content by 1 kilogram of glue (solid content 45%) through the low temperature drying of dipping phenol glue (or melamine glue);
B, assembly, each up and down from outside to inside: 3～5 layers of dipping phenol glue be the longitudinal texture bamboo curtain splint 2 of 1.0～1.5mm through the thickness of low temperature drying, use inwards 11 layers of Wooden veneer or bamboo curtain splint, middle three layers are longitudinal texture, and remaining veneer or bamboo curtain splint are laid by a longitudinal texture and a cross grain.Then be 135～150 ℃ in temperature, under the condition that maximum pressure is 2.0～4.0MPa, carry out hot pressing, keep 30～35 minutes, then in heating platen, lead to cold water, release after heating platen is cooled to uniform temperature.
After conventional post-production, can obtain finished product composite container baseboard, its physical and mechanical property is as follows: MOR//: >=95MPa
MOR⊥：≥35MPa
MOE//：≥11500MPa
MOE⊥：≥3500MPa
Density: 0.75～0.90g/cm 3.

Claims (3)

1. hot-forming high elastic modulus bamboo wood composite container baseboard once, is characterized in that adopting the thin bamboo curtain splint of the longitudinal texture of one deck (1), 2～4 layers of longitudinal texture bamboo curtain splint of A (2) and one deck cross grain Wooden veneer (3) with top and bottom layer material; Top and bottom layer material is inwardly structure wood shavings central layers (4); Or top and bottom layer material is inside all with longitudinal texture Wooden veneer (5) and multilayered wood veneer (8), totally 11 layers of Wooden veneer, middle three layers are longitudinal texture veneer, and remaining veneer is laid by a longitudinal texture veneer and a cross grain veneer.
2. once hot-forming high elastic modulus bamboo wood composite container baseboard according to claim 1, it is characterized in that with top and bottom layer material 3～5 layers of longitudinal texture bamboo curtain splint of A (2) and one deck cross grain Wooden veneer (3), top and bottom layer material inwardly uses cross grain bamboo curtain splint (6) and the longitudinal texture bamboo curtain splint of B (7) to replace longitudinal texture Wooden veneer (5) and cross grain Wooden veneer (3), totally 11 layers of Wooden veneer or bamboo curtain splint, middle three layers are longitudinal texture, and remaining veneer or bamboo curtain splint are laid by a longitudinal texture and a cross grain.
3. once hot-forming high elastic modulus bamboo wood composite container baseboard according to claim 1, it is characterized in that the outer one deck thin veneer that posts of the described thin bamboo curtain splint of longitudinal texture (1) or the longitudinal texture bamboo curtain splint of A (2), or hard paper, or phenolic impregnated glass fabric.
CN201010231754.XA 2010-07-21 2010-07-21 Bamboo and wood composite container bottom plate manufactured by one-step hot pressing and having high elastic modulus and manufacture method thereof Active CN102717408B (en)

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Application publication date: 20121010

Assignee: Yongan Yalin Bamboo Research Institute Co., Ltd.

Assignor: Nanjing Forestry University

Contract record no.: 2018320000437

Denomination of invention: Bamboo and wood composite container bottom plate manufactured by one-step hot pressing and having high elastic modulus and manufacture method thereof

Granted publication date: 20140618

License type: Common License

Record date: 20181225